Thermal Characterization and Microstructure Change of Cobalt Oxides |
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| Authors: | Chen-Bin Wang Hung-Kuan Lin Chih-Wei Tang |
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| Affiliation: | 1. Department of Applied Chemistry, Chung Cheng Institute of Technology, National Defense University, Tahsi, Taoyuan, 33509, Taiwan, Republic of China
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| Abstract: | A series of cobalt oxides with different oxidation states have been prepared by using a precipitation-oxidation method and a controlled reduction method (in situ thermogravimetry-temperature programmed reduction, STG-TPR). The gradual change in microstructure with different oxides is studied by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The results show that high-valence cobalt oxide is hexagonal with an elongated shape, Co3O4 is spinel with hollow spheroidal shape and CoO is a face-centered cubic structure, respectively. |
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